Sung J. Woo's Lines begins as a Sliding Doors-style story and follows the trope of showing us two very different paths that a couple's relationship takes after they literally collide in Washington Park, or have a near miss.
What Sung does so beautifully is that the two paths of the relationship are not different purely because of some mechanistic reason (e.g., like in the movie, catching the train leads to finding your husband is cheating); instead he taps an essential truth of human relationships. I am afraid to spoil anything further, will stop there, and simply recommend reading.
